Tungsten is one of the most important candidate materials in plasma surface materials, due to its excellent physical and chemical properties. On the basis of comparison and analysis of damage behavior of pure tungsten and tungsten-base materials under high heat load, such as rolled tungsten, recrystallization tungsten, W-La2O3、W-TiC、W-ZrC、W-V and W-Ta. Damage mechanism are discussed. Several key issues which need to be studied hereafter are put forward.